North Raccoon River IA 04-RAC-1131

from confluence with Camp Cr. (S7 T86N R34W Calhoun Co.) to confluence with Indian Cr. in S24 T87N R36W Sac Co.

This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.

Assessment Cycle

1996

Result Period

1992 - 1994

Designations

Assessment Type

Monitored

Integrated Report

Category 0

Legacy ADBCode

IA 04-RAC-0040_5

Overall Use Support

Threatened

Aquatic Life Use Support

Fully

Fish Consumption

Not assessed

Primary Contact Recreation

Threatened

Documentation

Assessment Comments

Assessment is based on results of IDNR ambient monitoring downstream from Sac City in 2000-01.

Basis for Assessment

Had 1 violation (same sample as for 1994 report) of acute Class B(WW) TRC WQ criterion in the 35 samples collected over 3 years; no other violations of Class B WQC; thus assess aquatic life use as FST. Had relatively large number of samples that violated the Class A WQ criterion for fecal coliform bacteria: 10 of 13 non flow-affected samples exceeded the Class A WQC (=77% viol =NS). Levels of fecals in samples from July thru October 1994 were well above WQC (81,000, 690, 7,700, and 2,800); most other violations less than 350 orgs/100 ml.